Kato USA Model Train Products HM1 UNITRACK R670mm Basic Oval Track with Power Pack Basic oval made from 26 3/8" radius curves, includes rerailer and Power pack for an out-of-the-box operating track set; just add locomotives and cars Perfect to start KATO HO UNITRACK and KATO HO Train Models Easy to use assorted track set in a box Reliable and easy-to-use UNITRACK snap track system makes setting up both temporary and permanent layouts a snap